17. Madhuban

Communist Party of India held the seat; the winning margin narrowed from 60.3% to 27.0%.

• Won on a lower shareIts own vote share fell 23.5% — it held because the rest of the vote was more divided.
• Vote fragmentedThe top two took only 79.4% between them, down from 93.2% — the field split more ways.

Written from the constituency figures by a fixed set of rules — no language model.